If you cant run so-rule, you can modify the configuration manually in the manager pillar file at /opt/so/saltstack/local/pillar/minions/_.sls (where is manager, managersearch, standalone, or eval depending on the manager type that was chosen during install). Network Security Monitoring, as a practice, is not a solution you can plug into your network, make sure you see blinking lights and tell people you are secure. It requires active intervention from an analyst to qualify the quantity of information presented. Long-term you should only run the rules necessary for > your environment. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. 41 - Network Segmentation, VLANs, and Subnets. For example, consider the following rules that reference the ET.MSSQL flowbit. At the end of this example IPs in the analyst host group, will be able to connect to 80, 443 and 8086 on our standalone node. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. . However, the exception is now logged. You can do so via the command line using curl: Alternatively, you could also test for additional hits with a utility called tmNIDS, running the tool in interactive mode: If everything is working correctly, you should see a corresponding alert (GPL ATTACK_RESPONSE id check returned root) in Alerts, Dashboards, Hunt, or Kibana. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. To unsubscribe from this group and stop receiving emails from it, send an email to. Revision 39f7be52. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Adding local rules in Security Onion is a rather straightforward process. A. You can learn more about snort and writing snort signatures from the Snort Manual. To configure syslog for Security Onion: Stop the Security Onion service. Revision 39f7be52. Revision 39f7be52. Data collection Examination This will execute salt-call state.highstate -l info which outputs to the terminal with the log level set to info so that you can see exactly whats happening: Many of the options that are configurable in Security Onion 2 are done via pillar assignments in either the global or minion pillar files. Are you sure you want to create this branch? There may be entire categories of rules that you want to disable first and then look at the remaining enabled rules to see if there are individual rules that can be disabled. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. By default, only the analyst hostgroup is allowed access to the nginx ports. Please note if you are using a ruleset that enables an IPS policy in /etc/nsm/pulledpork/pulledpork.conf, your local rules will be disabled. For example, if ips_policy was set to security, you would add the following to each rule: The whole rule would then look something like: These policy types can be found in /etc/nsm/rules/downloaded.rules. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. For example: If you need to modify a part of a rule that contains a special character, such as a $ in variable names, the special character needs to be escaped in the search part of the modify string. These non-manager nodes are referred to as salt minions. Our documentation has moved to https://securityonion.net/docs/. Logs . Then tune your IDS rulesets. One of those regular interventions is to ensure that you are tuning properly and proactively attempting to reach an acceptable level of signal to noise. Can anyone tell me > > > > what I've done wrong please? In the image below, we can see how we define some rules for an eval node. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. If you dont want to wait 15 minutes, you can force the sensors to update immediately by running the following command on your manager node: Security Onion offers the following choices for rulesets to be used by Suricata. To enable the Talos Subscriber ruleset in an already installed grid, modify the /opt/so/saltstack/local/pillar/minions/ file as follows: To add other remotely-accessible rulesets, add an entry under urls for the ruleset URL in /opt/so/saltstack/local/pillar/minions/: Copyright 2023 Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. If you need to manually update your rules, you can run the following on your manager node: If you have a distributed deployment and you update the rules on your manager node, then those rules will automatically replicate from the manager node to your sensors within 15 minutes. MISP Rules. Escalate local privileges to root level. Home About Us Bill Pay 877-213-8180 Product Library My accountItems of interest (0) Get your campus card Your campus card allows you to borrow books from the Library, use services at the student centre, make payments at Macquarie University retail outlets, and identify yourself during class tests and . 7.2. Adding local rules in Security Onion is a rather straightforward process. Please note! Then tune your IDS rulesets. Also ensure you run rule-update on the machine. I've just updated the documentation to be clearer. /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml is where many default named hostgroups get populated with IPs that are specific to your environment. PFA local.rules. Security Deposit Reliable Up to $5,000 Payments Higher rents as supported by comparable rents Higher Voucher Payment Standards (VPS) 10/1/2021 Signing Bonus 1 - Bedroom = $893 to $1,064 2 - Bedroom = $1,017 to $1,216 3 - Bedroom = $1,283 to $1,530 4 - Bedroom = $1,568 to $1,872 5 - Bedroom = $1,804 to $2,153 6 - Bedroom = $2,038 to . To generate traffic we are going to use the python library scapy to craft packets with specific information to ensure we trigger the alert with the information we want. To get the best performance out of Security Onion, youll want to tune it for your environment. There may be entire categories of rules that you want to disable first and then look at the remaining enabled rules to see if there are individual rules that can be disabled. 5. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. You may see the following error in the salt-master log located at /opt/so/log/salt/master: The root cause of this error is a state trying to run on a minion when another state is already running. This repository has been archived by the owner on Apr 16, 2021. we run SO in a distributed deployment and the manager doesn't run strelka but does run on the sensor, the paths however (/opt/so/saltstack/local/salt/strelka/rules) exist on the manger but not the sensor, I did find the default repo under opt/so/saltstack/default/salt/strelka/rules/ on the manager and I can run so-yara-update but not so-strelka-restart because its not running on the manager so I'm a little confused on where I should be putting the custom YARA rules because things don't line up with the documentation or I'm just getting super confused. We created and maintain Security Onion, so we know it better than anybody else. Once your rules and alerts are under control, then check to see if you have packet loss. A new version of our securityonion-rule-update package is now available that distributes OSSEC's local_rules.xml from master server to slave sensors by default and also allows for NIDS/HIDS rule tuning per physical sensor. This is an advanced case and you most likely wont never need to modify these files. See above for suppress examples. In syslog-ng, the following configuration forwards all local logs to Security Onion. A tag already exists with the provided branch name. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. If you try to disable the first two rules without disabling the third rule (which has flowbits:isset,ET.MSSQL) the third rule could never fire due to one of the first two rules needing to fire first. 137 vi local.rules 138 sudo vi local.rules 139 vi cd .. 140 cd .. 141 vi securityonion.conf 142 sudo vi pulledpork/pulledpork.conf 143 sudo rule-update 144 history 145 vi rules/downloaded.rules 146 sudo vi local.rules 147 sudo vi rules/local.rules 160 sudo passwd david 161 sudo visudo 162 sudo vi rules/local.rules To generate traffic we are going to use the python library scapy to craft packets with specific information to ensure we trigger the alert with the information we want: Craft the layer 2 information. Revision 39f7be52. . You signed in with another tab or window. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. I have 3 simple use cases (1) Detect FTP Connection to our public server 129.x.x.x (2) Detect SSH Connection attempts (3) Detect NMAP scan. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Copyright 2023 If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. Salt sls files are in YAML format. This error now occurs in the log due to a change in the exception handling within Salts event module. Tracking. If you have multiple entries for the same SID, it will cause an error in salt resulting in all of the nodes in your grid to error out when checking in. The firewall state is designed with the idea of creating port groups and host groups, each with their own alias or name, and associating the two in order to create an allow rule. It . Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). Download Security Onion 20110116. You signed in with another tab or window. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. These are the files that will need to be changed in order to customize nodes. It is now read-only. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. jq; so-allow; so-elastic-auth; so . A node that has a port group and host group association assigned to it will allow those hosts to connect to those ports on that node. We can start by listing any rules that are currently modified: Lets first check the syntax for the add option: Now that we understand the syntax, lets add our modification: Once the command completes, we can verify that our modification has been added: Finally, we can check the modified rule in /opt/so/rules/nids/all.rules: To include an escaped $ character in the regex pattern youll need to make sure its properly escaped. For example, suppose we want to disable SID 2100498. Integrated into the Security Onion, OSSEC is a host-based intrusion detection system (HIDS) that can conduct file integrity monitoring, local log monitoring, system process monitoring, and rootkit detection. This writeup contains a listing of important Security Onion files and directories. When setup is run on a new node, it will SSH to the manager using the soremote account and add itself to the appropriate host groups. Any line beginning with "#" can be ignored as it is a comment. Once logs are generated by network sniffing processes or endpoints, where do they go? However, generating custom traffic to test the alert can sometimes be a challenge. Add the following to the sensor minion pillar file located at. Please update your bookmarks. In this step we are redefining the nginx port group, so be sure to include the default ports as well if you want to keep them: Associate this port group redefinition to a node. This way, you still have the basic ruleset, but the situations in which they fire are altered. If you dont want to wait for these automatic processes, you can run them manually from the manager (replacing $SENSORNAME_$ROLE as necessary): Lets add a simple rule to /opt/so/saltstack/local/salt/idstools/local.rules thats really just a copy of the traditional id check returned root rule: Restart Suricata (replacing $SENSORNAME_$ROLE as necessary): If you built the rule correctly, then Suricata should be back up and running. In a distributed Security Onion environment, you only need to change the configuration in the manager pillar and then all other nodes will get the updated rules automatically. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. From the Command Line. If you built the rule correctly, then snort should be back up and running. You could try testing a rule . Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. I have had issues with Sguil when working with a snapshot and have not found a fix yet.. On Monday, June 26, 2017 at 8:28:44 PM UTC+5:30, KennyWap wrote: security-onion+unsubscribe@googlegroups.com, https://groups.google.com/group/security-onion. To enable or disable SIDs for Suricata, the Salt idstools pillar can be used in the minion pillar file (/opt/so/saltstack/local/pillar/minions/_.sls). After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? The error can be ignored as it is not an indication of any issue with the minions. The National Institutes of Standards and Technology (NIST) 800-171 cybersecurity standard has four safeguards that are related to network traffic monitoring: 3.13.1: Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information to security-onion > > My rules is as follows: > > alert icmp any any -> (msg:"ICMP Testing"; sid:1000001; rev:1:) the rule is missing a little syntax, maybe try: alert icmp any any ->. You may want to bump the SID into the 90,000,000 range and set the revision to 1. /opt/so/saltstack/default/salt/firewall/portgroups.yaml, /opt/so/saltstack/default/salt/firewall/hostgroups.yaml, /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml, /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml, /opt/so/saltstack/local/pillar/minions/_.sls, Allow hosts to send syslog to a sensor node, raw.githubusercontent.com (Security Onion public key), sigs.securityonion.net (Signature files for Security Onion containers), rules.emergingthreatspro.com (Emerging Threats IDS rules), rules.emergingthreats.net (Emerging Threats IDS open rules), github.com (Strelka and Sigma rules updates), geoip.elastic.co (GeoIP updates for Elasticsearch), storage.googleapis.com (GeoIP updates for Elasticsearch), download.docker.com (Docker packages - Ubuntu only), repo.saltstack.com (Salt packages - Ubuntu only), packages.wazuh.com (Wazuh packages - Ubuntu only), 3142 (Apt-cacher-ng) (if manager proxy enabled, this is repocache.securityonion.net as mentioned above), Create a new host group that will contain the IPs of the hosts that you want to allow to connect to the sensor. The ip addresses can be random, but I would suggest sticking to RFC1918: Craft the layer 3 information Since we specified port 7789 in our snort rule: Use the / operator to compose our packet and transfer it with the send() method: Check Sguil/Squert/Kibana for the corresponding alert. Security Onion has Snort built in and therefore runs in the same instance. You do not have permission to delete messages in this group, Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. There are multiple ways to handle overly productive signatures and well try to cover as many as we can without producing a full novel on the subject. These non-manager nodes are referred to as salt minions. The remainder of this section will cover the host firewall built into Security Onion. To enabled them, either revert the policy by remarking the ips_policy line (and run rule-update), or add the policy type to the rules in local.rules. Adding Local Rules Security Onion 2.3 documentation Docs Tuning Adding Local Rules Edit on GitHub Adding Local Rules NIDS You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Please note if you are using a ruleset that enables an IPS policy in /etc/nsm/pulledpork/pulledpork.conf, your local rules will be disabled. lawson cedars. in Sguil? These policy types can be found in /etc/nsm/rules/downloaded.rules. Files here should not be modified as changes would be lost during a code update. 2GB RAM will provide decent performance for the Sguil client and retrieving packet captures from the server but also enough to run Security Onion in standalone mode for monitoring the local client and testing packet captures with tools like tcpreplay, This is located at /opt/so/saltstack/local/pillar/minions/.sls. ET Open optimized for Suricata, but available for Snort as well free For more information, see: https://rules.emergingthreats.net/open/ ET Pro (Proofpoint) optimized for Suricata, but available for Snort as well rules retrievable as released With this functionality we can suppress rules based on their signature, the source or destination address and even the IP or full CIDR network block. Durio zibethinus, native to Borneo and Sumatra, is the only species available in the international market.It has over 300 named varieties in Thailand and 100 in Malaysia, as of 1987. to security-onion yes it is set to 5, I have also played with the alert levels in the rules to see if the number was changing anything. If we want to allow a host or group of hosts to send syslog to a sensor, then we can do the following: In this example, we will be extending the default nginx port group to include port 8086 for a standalone node. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Logs. For example, to check disk space on all nodes: If you want to force a node to do a full update of all salt states, you can run so-checkin. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. While Vanderburgh County was the seventh-largest county in 2010 population with 179,703 people, it is also the eighth-smallest county in area in Indiana and the smallest in southwestern Indiana, covering only 236 square miles (610 km2). After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. We offer both training and support for Security Onion. > To unsubscribe from this topic . If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. For more information, please see: # alert ip any any -> any any (msg:"GPL ATTACK_RESPONSE id check returned root"; content:"uid=0|28|root|29|"; classtype:bad-unknown; sid:2100498; rev:7; metadata:created_at 2010_09_23, updated_at 2010_09_23;), /opt/so/saltstack/local/pillar/minions/_.sls, "GPL ATTACK_RESPONSE id check returned root test", /opt/so/saltstack/default/pillar/thresholding/pillar.usage, /opt/so/saltstack/default/pillar/thresholding/pillar.example, /opt/so/saltstack/local/pillar/global.sls, /opt/so/saltstack/local/pillar/minions/.sls, https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html, https://redmine.openinfosecfoundation.org/issues/4377, https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. If there are a large number of uncategorized events in the securityonion_db database, sguil can have a hard time of managing the vast amount of data it needs to process to present a comprehensive overview of the alerts. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Please review the Salt section to understand pillars and templates. Copyright 2023 Salt sls files are in YAML format. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically.
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